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  2. Political eras of the United States - Wikipedia

    en.wikipedia.org/wiki/Political_eras_of_the...

    The "Fourth Party System" is the term used in political science and history for the period in American political history from the mid-1890s to the early 1930s, It was dominated by the Republican Party, excepting when 1912 split in which Democrats (led by President Woodrow Wilson) held the White House for eight

  3. List of decades, centuries, and millennia - Wikipedia

    en.wikipedia.org/wiki/List_of_decades,_centuries...

    Timelines of world history; List of timelines; Chronology; See calendar and list of calendars for other groupings of years. See history, history by period, and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang, Geologic time scale, Timeline of evolution, and Logarithmic timeline.

  4. Geochronology - Wikipedia

    en.wikipedia.org/wiki/Geochronology

    Biostratigraphy does not directly provide an absolute age determination of a rock, but merely places it within an interval of time at which that fossil assemblage is known to have coexisted. Both disciplines work together hand in hand, however, to the point where they share the same system of naming strata (rock layers) and the time spans ...

  5. Timeline of geopolitical changes - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_geopolitical...

    Timeline of geopolitical changes may refer to: Geopolitical changes: Timeline of geopolitical changes (before 1500) Timeline of geopolitical changes (1500–1899) Timeline of geopolitical changes (1900–1999) Timeline of geopolitical changes (2000–present) National border changes:

  6. Outline of the history of the United States - Wikipedia

    en.wikipedia.org/wiki/Outline_of_the_history_of...

    These multi-year periods are commonly identified in American history. The existence and dating of some of these periods is debated by historians. Plantation era ( c. 1700 – c. 1860 )

  7. Get the latest updates on the U.S. Elections. Stay informed with fast facts, candidate updates, and key takeaways on the issues, all in one place.

  8. Timeline of geopolitical changes (2000–present) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_geopolitical...

    This is a timeline of country and capital changes around the world since 2000. It includes dates of declarations of independence , changes in country name , changes of capital city or name, and changes in territory such as the annexation , cession , concession , occupation , or secession of land.

  9. Historical geology - Wikipedia

    en.wikipedia.org/wiki/Historical_geology

    18th-century geologist James Hutton contributed to an early understanding of the Earth's history by proposing the theory of uniformitarianism, which is now a basic principle in all branches of geology. Uniformitarianism describes an Earth formed by the same natural phenomena that are at work today, the product of slow and continuous geological ...

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